I already have all service packs applied so I entered the command as directed with the following variables:
cscript adsutil.vbs set w3svc/1/SetHostName exchange

This broke something in DNS and I couldn't load the page at all. Fortunately I had backed up the metabase right before so was able to do a full restore. Unfortunately none of the icons on the page would load which turned out to be an authentication problem but I was able to correct that.

Obviously making that change caused some kind of DNS problem but I'm not sure what variable I should replace "exchange" with in order to both fix the problem and allow OWA to continue operating. Any advice would be appreciated.